v3.0 [Apr 7, 2018]
1. Optimize UI.
2. Optimize the firmware update process.
3. Fix the problem that the custom setting is invalid when the GTF timing is negative
4. Fix the problem that two-stage popover can't be minimized.
5. Fix the problem that the popover about RGB, NV12, I420 still exist after removing the USB device.
6. Fix the problem of the failing to adjusting the microphone volume.
